SSC REST API - viewing issue groupings other than the default

Hi,

When using the SSC REST API to retrieve issues and issue groups for a project, the only issue groups that are visible for the issues is the default (the same you would see if you jumped into Audit and grouped the issues by Category). Is there any way to view the issues in groups other than the default? For instance, if I wanted to view the issues grouped into categories using an externally defined metadata format (STIG 4.3), is this supported by the REST API?

Thanks,

sg